The Mirror CONCEPT is accomplished by executing the
definition of the given call and replacing:

Right with Left and vice-versa; and

Beau with Belle and vice-versa.

At any point where you would normally pass Right-shoulders, pass
Left-shoulders and vice-versa. At any point where you would normally use the
Right-hand, use the Left-hand and vice-versa. At any point where the Beaus
do something, the Belles do it and vice-versa.

When doing the Mirror version of a call in which two dancers end on the
same spot (such as an odd Tally-Ho) step to Left hands instead of Right hands!
The Mirror CONCEPT is more binding than the Right-hand same-spot
rule.

Note: The words Left and Reverse have traditionally been used to
indicate Mirror (e.g., Left Swing Thru, Reverse Flutter Wheel) but their
usage is inconsistent. Dancers may not know what is intended when
something like 'Left Circle By' is called. Should one Circle Left the
first given fraction then Left Touch the next given fraction? Or,
since you are normally moving to the Left on a Circle By, should one
Circle Right the first fraction? Reverse can also mean
'In Reverse Order',
'Rewind', or have other meanings ('Reverse Stack The Line':
original Trailers instead of Leaders go across to right hands!). If we
only had the choice of using Left or Reverse, what would the Mirror version of
Shake & Rattle
be called? The Mirror version of Shakedown is
called Left Shakedown and the Mirror version of Reverse Split Swap is
called Split Swap! The Mirror CONCEPT resolves these
ambiguities.

Hint: If you can imagine dancing in a mirrored room and executing a
call normally, your reflection would be dancing the Mirror version of that call.

Common misconceptions: A Mirror Pass The Ocean is not a Pass The Sea. A Mirror
Pass The Ocean involves a Left-shoulder Pass Thru, whereas a Pass
The Sea involves a Right-shoulder Pass Thru.

Note: For many calls, the Mirror version of the call is the same as the call
itself. For example, a Mirror Scoot Back is a Scoot Back (since the definition
of Scoot Back does not involve Beaus|Belles or Left|Right); Similarly, when
starting from a Wave, a Mirror Spin The Top is the same as Spin The Top.

Mirror Circle By fraction By fraction | anything[C3B]:
From Facing Couples. Circle Right the first given fraction and Step To A Left-Hand Wave; Arm
Turn the second given fraction or do the anything call.
This call has historically been known as Reverse Circle By.

beforeMirror Circle By 1/4 By 1/4

afterCircle Right 1/4 and Step To A L-H Wave

afterArm Turn 1/4

(done)

Mirror Recycle[C3B]:
From Facing Couples.
Belles Extend and Left-Face U-Turn Back as Beaus Dodge into the Belle's
original starting position and Veer Right.
Ends in a L-H Wave.
Historically known as Reverse Recycle.

beforeMirror Recycle

after

Mystic CONCEPT[C4]:
Center 4 work Mirror as the Outer 4 work normal, and all do the given call.
If the call involves the Centers eventually working with the original
Outsides, then the completion of the call procedes in a normal manner (i.e.,
the original Centers no longer work Mirror). In this case, it would
be better if the caller said Initially Mystic.